Yes. If you have an all lace base, Then those knots will rotate with nothing more than a hairbrushing. You can order an all-lace piece to be back, forward, freestyle or with a left or right break, and then change your mind, as long as your stylist has not cut the hair to be in one intended style, and as long as you didn't order an open part.

But if you choose a base made from polyskin, you have to carefully choose the correct direction and crown position in the first place because if the unit is made to go forward, it will be harder to make the hairs do a u-turn and go back.